I use subvolumes, snapshots, and send/recv functionality for cheap replication of data. Sometimes even on RAIDed disks! There are only two file systems with th

I use subvolumes, snapshots, and send/recv functionality for cheap replication of data. Sometimes even on RAIDed disks! There are only two file systems with that feature set today: Btrfs and ZFS. I personally prefer Btrfs because it's way more flexible and shipped with the Linux kernel.